A Compensation Method for Orientation Error of Voltage-Current Hybrid Flux-Linkage Observer of Asynchronous Motor
A flux linkage observer, asynchronous motor technology, applied in the control of electromechanical brakes, control of generators, motor control and other directions, can solve problems such as affecting the performance of vector control, and achieve the effects of simple algorithm, improved reliability, and improved accuracy
Active Publication Date: 2022-05-27
希望森兰科技股份有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a method for compensating the orientation error of the asynchronous motor voltage-current mixed flux-linkage observer to solve the reasons such as changes in the working conditions of the asynchronous motor in view of the above-mentioned shortcomings in the flux observer algorithm based on the voltage model and current model of the asynchronous motor The problem that the change of motor parameters affects the performance of vector control improves the reliability, stability and dynamic response speed of the motor speedless vector control algorithm
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[0028] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments, so as to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of specific embodiments, for those of ordinary skill in the art, as long as various changes are limited and determined by the appended claims in the spirit and scope of the invention, these changes are obvious, all inventions conceived using the present invention are in the scope of protection.
[0029] The specific implementation steps are as follows:
[0030] as Figure 1 Shown is an algorithm block diagram of the present invention, comprising a current and voltage sampling portion, coordinate transformations, magnetic chain observations, magnetic chain orientation deviation angle calculations and magnetic chain observer filter coefficients K Fixes and other modules.
[0031] The impleme...
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The invention discloses a method for compensating the orientation error of an asynchronous motor voltage-current mixed flux linkage observer, belonging to the field of asynchronous motor control. The rotor flux linkage is obtained by calculating the voltage and current, and then the mutual inductance value of the motor in this state is checked in real time; the flux linkage orientation deviation angle is calculated according to the motor mutual inductance value and the current flux linkage observer filter coefficient; The chain orientation deviation angle deviation is controlled within the set range. The present application solves the problem of the inaccurate orientation of the rotor magnetic field caused by the inaccurate mutual inductance parameters of the traditional asynchronous motor voltage-current hybrid flux linkage observer, which leads to the decline of the vector control performance, and effectively improves the stability and dynamic response speed of the system. The algorithm is simple and has strong applicability.
Description
Technical field [0001] The present invention relates to the field of asynchronous motor control, specifically to a method of compensating for the directional error of the asynchronous motor voltage current hybrid flux observer having adaptive ability after the motor parameters change. Background [0002] Asynchronous motors have the advantages of simple structure, low price, easy maintenance and high reliability and are widely used in the field of AC transmission. Vector control algorithm is the main method in the current high-performance control algorithm, because the traditional speed encoder not only increases the cost, maintenance is difficult and easy to affect its accuracy and reliability by environmental factors, so the speedless vector control technology is currently commonly used vector control algorithm. The key to the speedless vector control algorithm of asynchronous motors lies in the precise identification of the rotor flux. The main methods of rotor flux identifica...
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IPC IPC(8): H02P21/13H02P21/14H02P21/26H02P25/02
CPCH02P21/13H02P21/141H02P21/26H02P25/02H02P2207/01
Inventor 张树林康劲松陈忠强宋玉明
Owner 希望森兰科技股份有限公司